HCG vs HMG (Menotropin)
HCG (Gonadotropin) and HMG (Menotropin) (Gonadotropin) are documented as co-studied in the PeptiDex library. This page puts the two entries side by side on class, molecular weight, half-life, origin, mechanism and studied research areas — every value taken from the entry it belongs to.
Why these two are co-studied
Cross-referenced for research context — not a usage or combination recommendation.
At a glance
| Attribute | HCG | HMG (Menotropin) |
|---|---|---|
| Compound class | Gonadotropin | Gonadotropin |
| Research category | Hormonal & Sexual Health | Hormonal & Sexual Health |
| Length (amino acids) | Not documented | Not documented |
| Molecular weight | ~36,700 Da (glycoprotein heterodimer) | Not documented |
| Half-life | ~30 hours (terminal) | FSH component ~30 h; LH component ~24 h |
| Origin | Human chorionic gonadotropin (HCG) is a glycoprotein hormone produced by the placenta during pregnancy. Pharmaceutical HCG is obtained from the urine of pregnant women or produced by recombinant technology (choriogonadotropin alfa). | Human menopausal gonadotropin (HMG, menotropin) is a purified preparation of gonadotropins extracted from the urine of postmenopausal women. It contains both follicle-stimulating hormone (FSH) and luteinizing hormone (LH) activity. |
“Not documented” means the PeptiDex entry records no value for that field. Nothing on this page is estimated, and no figure is carried over from one compound to the other.
How HCG works
HCG is a heterodimeric glycoprotein consisting of an alpha subunit (shared with LH, FSH, TSH) and a hormone-specific beta subunit. It acts as an agonist at the luteinizing hormone/choriogonadotropin receptor (LHCGR), thereby mimicking LH activity. In the gonads this stimulates testicular Leydig cells to produce testosterone and supports ovarian steroidogenesis and ovulation, which underlies its clinical use in fertility and endocrine medicine.
How HMG (Menotropin) works
HMG (menotropin) is a mixture of glycoprotein gonadotropins providing both FSH and LH activity, often standardized in roughly equal proportions. FSH activity stimulates ovarian follicular growth and, in men, spermatogenesis, while LH activity supports steroidogenesis and follicular maturation. By supplying combined gonadotropin activity, it directly drives gonadal function at the receptor level for fertility applications.
Mechanistic descriptions reflect published research-literature understanding and are quoted from each compound's own entry. Much peptide research is preclinical (in-vitro or animal-model); mechanism in humans may differ and is not established for many compounds.
Where each one appears in the literature
The research contexts each entry documents. Listing a research area is not a claim of efficacy or a therapeutic indication, and the two lists are not scored against each other.
Described in identical terms for both
HCG
HMG (Menotropin)
What sets each apart
HCG
HCG acts directly at the gonadal LHCGR as an LH mimic, unlike GnRH analogs (gonadorelin/triptorelin) that act at the pituitary or kisspeptin acting on GnRH neurons.
HMG (Menotropin)
HMG supplies combined FSH plus LH gonadotropin activity directly at the gonads, unlike HCG (LH-like only), GnRH analogs (pituitary-level), or kisspeptin (hypothalamic-level).
Frequently asked questions
What is HCG?
HCG (human chorionic gonadotropin) is a glycoprotein hormone that shares its alpha subunit with LH, FSH and TSH and binds the LH/hCG receptor with high affinity. Because it mimics luteinizing hormone at the gonad, it is studied as a direct gonadotropic stimulus of Leydig-cell (testosterone) and ovarian function.
What is HCG studied for in HPG-axis research?
In male models it is studied for stimulating Leydig-cell activity and intratesticular testosterone, and in axis-recovery research following exogenous androgen suppression. In female reproductive research it is studied as an ovulatory trigger. It is a regulated pharmaceutical hormone, not an approved research-chemical use.
Why does HCG have a much longer duration than LH?
HCG's terminal half-life is roughly 30 hours versus about 30 minutes for LH, owing to its heavier glycosylation and slower clearance. Because of this, peak testosterone responses in studies are typically seen ~72-96 hours after a dose, which shapes dosing intervals in research protocols.
How does HMG differ from HCG?
HMG supplies both FSH and LH activity, driving follicle or Sertoli/germ-cell development, whereas HCG mimics LH alone and mainly drives Leydig-cell testosterone or serves as an ovulatory trigger. In male fertility research the two are often combined for their complementary actions.
What is HMG (menotropin)?
HMG (human menopausal gonadotropin, menotropin) is a purified gonadotropin preparation derived from the urine of postmenopausal women, containing both FSH and LH activity (commonly at a roughly 1:1 ratio). It is studied and used as a combined follicle-stimulating and luteinizing signal to the gonad.
What is HMG studied and used for?
It is FDA-approved and used in fertility medicine to stimulate ovarian follicle development in women (ovulation induction and IVF) and spermatogenesis in men with hypogonadotropic hypogonadism. In research it appears in reproductive-endocrinology and controlled-ovarian-stimulation protocols.
Answers are the ones published on each compound's own PeptiDex entry. They are educational summaries of research-literature context and are not medical advice.